FX29K0-040B-0050-L

LOAD CELL, 50LBF, 5.5V, 0 TO 50DEG C

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Manufacturer: TE CONNECTIVITY
Product type: Force Sensors & Load Cells
Load Cell Type:Compression; Excitation Voltage Min:2.7VDC; Excitation Voltage Max:5.5VDC; Sensor Output Type:Digital-I2C; Connection Type:4 Wire Ribbon Cable with 40AH0470
SVHC: No SVHC (21-Jan-2025)
Linearity: -
Load Capacity: 50lb
Product Range: FX29 Series
Load Cell Type: Compression
Supply Voltage: 5.5V
Connection Type: 4 Wire Ribbon Cable with Connector
Weight Capacity: 50lbf
Cell Output mV / V: -
Sensor Output Type: Digital-I2C
Cable Length - Metric: 40mm
Excitation Voltage Max: 5.5VDC
Excitation Voltage Min: 2.7VDC
Cable Length - Imperial: 1.5748"
Operating Temperature Max: 50°C
Operating Temperature Min: 0°C

Delivery and price
Units per pack	10
Price	36.26 €
Current stock	10+
Lead time	30 days

Datasheet

## FX29 COMPRESSION LOAD CELL 

Versatile Miniature Force Sensor 

mV, Amplified, and Digital Outputs 

Low Power Consumption 

Rugged Microfused Sensing Element 

Stainless Steel Enclosure 

Several Load Ranges 

## FEATURES 

- Compact Design 

- mV or Amplified Analog Outputs 

- Optional I[2] C Digital Interface 

- High Over Range Capability 

## APPLICATIONS 

- Medical Infusion Pumps 

- Analog & Digital Scales 

- Fitness & Exercise Equipment 

- Payload Weighing 

- Power Tools 

- Robotics 

- Surgical & Dental Tools 

- Battery Powered Devices 

- Manufacturing Equipment 

TE Connectivity’s (TE) FX29 is a compact compression load cell that offers exceptional price-to-performance in a robust sensor package.  Optimized for embedded force sensing applications from disposable medical devices to durable appliances and exercise equipment.  The FX29 allows design flexibility with mV, amplified, and digital output options. 

The FX29 incorporates the high reliability Microfused technology and is offered in ranges from 10lbf to 100lbf (50N to 500N).  Microfused technology provides excellent span and zero stability, outstanding cycle life, superior resolution, high over-range capabilities, and an unamplified span sensitivity of 20mV/V. 

The FX29 utilizes a two-piece construction of stainless steel materials.  The combination of a metal injection molded flexure and micro miniaturized MEMS strain gauges allows flexibility of force range options for a lower cost sensor. These improvements over previous load cell designs give the FX29 more precise dimensional control and better performance. 

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FX29 COMPRESSION LOAD CELL 

## **Absolute Maximum Ratings (Analog)[(1][)]** 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Supply voltage|Vdd|||6.0|V|Analog mV Output|
|||||5.25|V|Analog 0.5-4.5V Output|
|Storage temperature|TS|-40||+85|°C||
|Compressive load|Lmax|||2.5X|Rated||
|ESD||-4.0||4.0|kV|Human Body Model|



(1) Maximum limits the device will withstand without damage 

## **Standard Load Ranges** 

|**Pounds-Force(lbf)**|**Newtons(N)**|
|---|---|
|10|50|
|25|125|
|50|250|
|100|500|



## **Electrical Specifications (Analog)** 

## (Unless otherwise specified, all parameters are measured at 25°C @ 5.0V applied) 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Supply voltage (Vsupply)|Vdd|1.00||6.0|V|mV Output only|
|||4.75||5.25|V|0.5-4.5V Output only|
|Operating current|Idd|||3|mA|0.5-4.5V Output only|
|Input resistance|Rin|2.4|3.0|3.6|kΩ|mV Output only|
|Output resistance|Rout|1.76|2.2|2.64|kΩ|mV Output only|
|Rise time|Tr|||2.0|ms|10% to 90%|
|Maximum output current|Io|2.2|||mA|0.5-4.5V Output only|
|Output short circuit duration|Ts|||∞|seconds|0.5-4.5V Output only|
|Insulation resistance||50|||MΩ|@250VDC|
|Bandwidth||||1.0|kHz||



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## **Operating Specifications (Analog)** 

## (Unless otherwise specified, all parameters are measured at 25°C @ 5.0V applied) 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Zero offset1||-15||15|mV/V|mV Output only|
|||300|500|700|mV|0.5-4.5V Output only|
|Full scale span1||16|20|24|mV/V|mV Output only|
|||3800|4000|4200|mV|0.5-4.5V Output only|
|Non-linearity||-1||1|%Span|BFSL|
|Hysteresis||-0.8||0.8|%Span||
|Zero repeatability||-0.8||0.8|%Span||
|Span repeatability||-0.8||0.8|%Span||
|Thermal shift for zero||-0.05||0.05|%Span/°C|Reference to 25°C, over<br>compensated temperature|
|Thermal shift for span||-0.05||0.05|%Span/°C||
|Cycle life||1E+6||||0 to full scale cycles|
|Deflection at rated load||||0.03|mm||
|Weight|||6.0||grams|Without ribbon cable|



(1)Span and zero offset are ratiometric to power supply voltage 

## **Environmental Specifications (Analog)** 

(Unless otherwise specified, all parameters are measured at 25°C @ 5.0V applied) 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Compensated temperature<br>range|To|0||50|°C|0.5-4.5V Output only|
|Storage temperature|Ts|-40||85|°C||
|Ambient humidity||0||85|%RH|Non-condensing|
|EMI/RFI/ESD protection||IEC61000-4-2 (8kVair/4kVcontact)<br>IEC61000-4-3 (3V/m)<br>IEC55032 Class A||||mV Output only|
|Ingress protection|IP|43|||||
|Media compatibility||External exposed surfaces: 17-4 and 304<br>stainless steel||||Excluding cable &<br>connector|



TE CONNECTIVITY SENSORS /// FX29       DOC CONTROL NUMBER  05142019 

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~~a~~ 

## **Schematic Diagram – mV output (Analog)** 

## **Block Diagram – 0.5 to 4.5V output (Analog)** 

**==> picture [59 x 112] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vdd<br>ANALOG<br>OUTPUT<br>**----- End of picture text -----**<br>


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## **Absolute Maximum Ratings (Digital)[(1][)]** 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Supply voltage||||5.50|V||
|Storage temperature|TS|-40||+85|°C||
|Compressive load|Lmax|||2.5X|Rated||
|ESD||-4.0||4.0|kV|Human Body Model|



(1)Maximum limits the device will withstand without damage 

## **Standard Load Ranges** 

|**Pounds-Force(lbf)**|**Newtons(N)**|
|---|---|
|10|50|
|25|125|
|50|250|
|100|500|



## **Electrical Specifications (Digital)** 

|**Electrical Specifications (Digital)**|**Electrical Specifications (Digital)**|**Electrical Specifications (Digital)**|**Electrical Specifications (Digital)**||||
|---|---|---|---|---|---|---|
|(Unless otherwise specified, all parameters are measured||||at 25°C @ 3.0V applied)|||
|<br>**Parameter**|<br>**Symbol**|<br>**Min**|<br>**Typ**|<br>**Max**|<br>**Units**|<br>**Notes/Conditions**|
|Supply voltage (Vsupply)|Vdd|2.7||5.5|V||
|Operating current|Idd|||3|mA||
|Sleep mode current|Islp||0.5|5|µA||
|Insulation resistance||50|||MΩ|@250VDC|



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## **Force Operating Specifications (Digital)** 

## (Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied) 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Zero offset||300|1000|1700|Counts|Base10|
|Full scale span||14300|15000|15700|Counts|Base10|
|Non-linearity||-1||1|%Span|BFSL|
|Hysteresis||-0.8||0.8|%Span||
|Zero repeatability||-0.8||0.8|%Span||
|Span repeatability||-0.8||0.8|%Span||
|Thermal shift for zero||-0.05||0.05|%Span/°C|Reference to 25°C, over<br>compensated temperature|
|Thermal shift for span||-0.05||0.05|%Span/°C||
|Cycle life||1E+6||||0 to full scale cycles|
|A/D resolution|||14||Bits||
|Response time||||3|mS|4MHz, non-sleep mode|
|||||8.4|mS|4MHz, sleep mode|
|Deflection at rated load||||0.03|mm||
|Weight|||6.0||grams|Without ribbon cable|



## **Environmental Specifications (Digital)** 

(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied) 

|**Parameter**|**Symbol**|**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Compensated temperature<br>range|To|0||50|°C||
|Storage temperature|Ts|-40||85|°C||
|Ambient humidity||0||85|%RH|Non-condensing|
|Ingress protection|IP|43|||||
|Media compatibility||External exposed surfaces: 17-4 and 304<br>stainless steel||||Excluding cable &<br>connector|



TE CONNECTIVITY SENSORS /// FX29       DOC CONTROL NUMBER  05142019 

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## **Block Diagram – I[2] C Digital Output (Digital)** 

**==> picture [20 x 16] intentionally omitted <==**

**----- Start of picture text -----**<br>
SDA<br>SCL<br>**----- End of picture text -----**<br>


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## ~~a~~ 

## **Force Output Graph (Digital)** 

|Force Sensor Output|Force Sensor Output|Force Sensor Output|
|---|---|---|
|%Output|Counts(decimal)|Counts(hex)|
|0%|1000|0x3E8|
|5%|1700|0x6A4|
|10%|2400|0x960|
|50%|8000|0x1F40|
|90%|13600|0x3250|
|95%|14300|0x37DC|
|100%|15000|0x3A98|



**I[2] C Typical Circuit** 

Note: only one pair of pull up resistors are needed for multiple sensing devices. 

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FX29 COMPRESSION LOAD CELL 

## **I[2] C Interface** 

|**I[2]C Interface**|**I[2]C Interface**||||||
|---|---|---|---|---|---|---|
|**Parameter**<br>**Symbol**||**Min**|**Typ**|**Max**|**Units**|**Notes/Conditions**|
|SCLK clock frequency|FSCL<br>~~|~~|100<br>~~fF~~|~~fF~~|400|kHz||
|Start condition hold time relative to<br>SCL edge|tHOSTA<br>~~|~~<br>~~ee~~|0.1<br>~~fF~~<br>~~ee~~|~~fF~~<br>~~ee~~|~~ee~~|µS||
|Minimum SCL clock low width1|tLOW<br>~~|~~<br>~~ee~~|0.6<br>~~fF~~<br>~~ee~~|~~fF~~<br>~~ee~~|~~ee~~|µS||
|Minimum SCL clock high width1|tHIGH<br>~~ee ~~|0.6<br> ~~ee ~~|~~ee ~~|~~ee~~<br>~~ee~~|µS<br>~~ee~~||
|Start condition startup time relative to<br>SCL edge|tSUSTA<br>~~a ee~~|0.1<br>~~ee~~|~~ee~~|~~ee~~<br>~~ee~~|µS<br>~~ee~~<br>~~ee~~||
|Data hold time on SDA relative to SCL<br>edge|tHDDAT<br>~~a ee~~|0<br>~~ee~~|~~ee~~|~~ee~~<br>~~ee ~~|µS<br>~~ee~~<br> ~~ee~~||
|Data setup time on SDA relative to<br>SCL edge|tSUDAT|0.1|||µS||
|Stop condition setup time on SCL|tSUSTO<br>~~ff~~|0.1<br>~~ff~~|||µS<br>||
|Bus free time between stop and start<br>condition|tBUS<br>~~ff~~|2<br>~~fffF~~|~~fF~~|~~fF~~|µS<br>~~fF~~||



## **I[2] C Interface Timing Diagram** 

## **Digital Input and Output Parameters** 

(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied) 

|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Parameter**<br>**Symbol**|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Parameter**<br>**Symbol**|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Min**|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Typ**|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Max**|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Units**|(Unless otherwise specified, all parameters are measured at 25°C @ 3.0V applied)<br>**Notes/Conditions**|
|---|---|---|---|---|---|---|
|Input high voltage|VIH|0.8||1.0|x Vdd||
|Input low voltage|VIL|0.0V||0.2|x Vdd||
|Output low level|||||x Vdd||
|Load capacitance @ SDA||||200|pF|@400 kHz|
|Input capacitance (each pin)||||10|pF||



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~~eeeCe~~ er ee ee ~~ee eee eee~~ 

## **I[2] C Measurement Packet Read Sequence** 

TE CONNECTIVITY SENSORS /// FX29       DOC CONTROL NUMBER  05142019 

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FX29 COMPRESSION LOAD CELL 

N **e** eeeeeeeeeeeeeeeeeee ~~ener eee~~ 

## **General Working Mode** 

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## ~~a~~ 

## **Outline Drawing and Connections** 

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**Ordering Information** 

FX29 x x – xxx x – xxxx – x 

**==> picture [504 x 295] intentionally omitted <==**

**----- Start of picture text -----**<br>
Output Signal  Measurement Units<br>Code Output Output Type L  Pounds-force (lbf)*<br>2  20 mV/V*  mV  N  Newtons<br>3 0.5 – 4.5V*  Amplified<br>J I [2] C (No sleep)*  Digital<br>Load Range<br>K  I [2] C (Sleep)  Digital<br>LBF  Newtons<br>0010*  0050<br>I [2] C Address 0025*  0125<br>Code Device Address (hex) 0050*  0250<br>X Analog Output* 0100*  0500<br>0 0x28*<br>1  0x36  Cable & Connector<br>2  0x46  Code Cable and Connector<br>3 0x48  A  4-wire ribbon cable without connector*<br>FG 4  0x51  B  4-wire ribbon cable with connector<br>Note:<br>Cable Length  For digital output, ensure custom cable length does<br>Code Length  ee not exceed 1 meter.<br>040 40 mm<br>100 100 mm*<br>XXX  Custom Length<br>**----- End of picture text -----**<br>


*Sensor features shown in **bold** are typically stocked by our distribution partners, or available with short lead times from the factory depending on availability.  Contact customer service for details. 

## **REVISION HISTORY** 

||**REVISION HISTORY**||||
|---|---|---|---|---|
||**Revision Number **|**Change Description **|**Date**|**Approval **|
||A0|Initial release|05/13/2019|PRS|
||A3|Minorcorrections ;|06/24/2019|MH|
|**NORTH AMERICA**||**EUROPE**|**ASIA**||
|Tel +1 800 522 6752||Tel +31 73 624 6999|Tel +86 0400 820 6015||
|customercare.frmt@te.com||customercare.lcsb@te.com|customercare.shzn@te.com||



## **te.com/sensorsolutions** 

Microfused, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. 

The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. 

© 2019 TE Connectivity Ltd. family of companies All Rights Reserved. 

TE CONNECTIVITY SENSORS /// FX29       DOC CONTROL NUMBER  05142019 

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Updated at April 23, 2026

TE Connectivity is a globally recognized engineering and manufacturing leader, specializing in highly reliable connectivity and sensing solutions. Renowned for innovation and durability, their components are engineered to perform in the most demanding environments, supporting critical advancements in industrial equipment, data communications, and automotive systems. Our extensive selection of TE Connectivity products is anchored by their industry-leading connector portfolio. We carry a comprehensive array of terminal blocks and accessories, including wire-to-board, pluggable, standard, and barrier configurations, alongside robust backplane connectors designed to ensure secure and efficient power and data transmission in complex circuit designs. Beyond physical connections, TE Connectivity is a premier manufacturer of precision sensors, antennas, and electromechanical switching components. Our inventory features a wide variety of RF antennas and highly accurate pressure, temperature, and force transducers. Additionally, we provide an expansive range of TE's dependable relays, encompassing automotive, power, and signal variants, alongside essential passive components like shielding gaskets and RF inductors to fully support your engineering requirements.

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